Abstract:
On the seventh of November 2023, Stars Enviornment on the BNB Chain was attacked. The assault was made doable resulting from a logical flaw within the staking contract. Round $151k value of tokens had been stolen by the attacker.
About Venture:
Stars Enviornment is a Social Token Platform on Avalanche Chain. For extra data, take a look at their web site.
Vulnerability Evaluation & Affect:
On-Chain Particulars:
Attacker Handle: 0x1a7b15354e2f6564fcf6960c79542de251ce0dc9
Sufferer Contract: 0x1694d7fabf3b28f11d65deeb9f60810daa26909a
The Root Trigger:
The basis reason for the exploit was a logic flaw in TrustPad’s Staking Contract
The receiveUpPool() perform was chargeable for accepting the upPool request from one other pool and strikes the desired quantity of tokens from the person after which re-locks, after which change the lock time interval to now. Right here, upPool means transferring the tokens to a different pool.
Discover how msg.sender isn’t verified within the above contract. This allowed attacker to repeatedly name receiveUpPool() and withdraw()
Consequently, the attacker acquires the potential to right away withdraw all staked funds and enhance the pending reward standing by way of the execution of the withdraw() perform.
Following the repetition of those actions, the attacker employs the stakePendingRewards() perform to maneuver all pending rewards into the staked quantity state, enabling them to withdraw these rewards as revenue later utilizing the withdraw() perform.
Assault Course of:
First, the attacker deposit TPAD token into LaunchpadLockableStaking contract with the assistance of receiveUpPool() perform.
Then the attacker repeatedly name stakePendingRewards() and withdraw perform to extend the impression of the assault.
Lastly, the attacker was in a position to withdraw all of the funds.
Circulation of Funds:
Right here is the fund circulate throughout and after the exploit. You may see extra particulars right here.
Quickly after the hack, the attacker began to switch funds to Twister Money. See right here.
After the Exploit
The Venture acknowledged the hack by way of their Twitter.
Incident Timelines
Nov-06-2023 04:02:52 PM +UTC – The attacker began the assault after making a malicious contract.
Nov-07-2023 01:56:56 AM +UTC – The attacker repeatedly referred to as weak perform. This was the final transaction noticed
Nov-07-2023 12:32:42 PM +UTC – The attacker began depositing funds to Twister Money.
Value Affect
The worth of the TPAD token dropped from $0.120 to $0.0016 instantly following the assault. It’s presently buying and selling at $0.0011 as of the time of scripting this weblog. See right here.
How might they’ve prevented the Exploit?
Inadequate enter validation and logical flaws have been the goal of hackers for a really very long time.
It is suggested for protocols to prioritize testing and fuzzing to make sure all the sting circumstances have been efficiently mitigated.
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